Effects of Crop Rotation System on the Parasitic Fungi Associated with Soybean Cyst Nematode Second-stage Juvenile(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:

2011年02期

Page:

277-280

Research Field:

Publishing date:

Info

Title:

Effects of Crop Rotation System on the Parasitic Fungi Associated with Soybean Cyst Nematode Second-stage Juvenile

Author(s):

SUN Yu-qiu¹; 2;  XU Yan-li¹;  LI Chun-jie¹;  PAN Feng-juan¹;  ZHANG Yuan³

1.Key Laboratory of Mollisols Agroecology, National Observation Station of Hailun Agroecology System, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin 150081, Heilongjiang;?

2. Graduate University of Chinese Academy of Sciences， Beijing 100049;?

3. Plant Quarantine and Plant Protection Station of Heilongjiang Province, Harbin 150090， Heilongjiang， China

Keywords:

Soybean cyst nematode;  Second-stage juvenile;  Fungi

PACS:

S565.1

DOI:

10.11861/j.issn.1000-9841.2011.02.0277

Abstract:

Using sucrose gradient centrifugation and conventional fungal identification techniques to study the population density of soybean cyst nematode second-stage juvenile and their parasitized fungi Hirsutella spp.. There were four rotation systems of soybean, including long-term soybean monoculture, corn/soybean annual rotation, wheat/soybean annual rotation, wheat/corn/soybean rotation and a control(fallow). The results showed only Hirsutella minnesotensis was detected in the long-term soybean monoculture field, in other rotations, there were two kinds of parasitic fungi (Hirsutella rhossiliensis and Hirsutella minnesotensis). In 15 and 16 years of continuous cropping soybean fields, the population density of soybean cyst nematode second-stage juvenile was lower than other rotation cropping fields, while parasitism of second-stage juveniles by Hirsutella spp. was higher than other soybean stubbles.

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